It was so rare and spectacular that even former Prime Minister Lee Hsien Loong shared photo of it. Read more at stomp.straitstimes.com ...

To see the full circle, however, you will have to be in an airplane, literally above the clouds. Or you could create your own ...

Rainbows form when a unique combination of meteorological and atmospheric conditions come together at the perfect time, and ...

If you were high up in a plane, or up a mountain, you would see a rainbow as a full circle. The next time it is a sunny day you can even create your own rainbow! If you use a water spray or hose ...

The higher your vantage point, the more likely you’ll see more of the rainbow’s circle. Chen Hui/VCG via Getty Images ...